Ranking Score Explained

Hi there, thanks for your interest in how we calculate an experience's ranking score. It's at the core of Rankers so I'm pleased you're curious.

The ranking score percentage is used to compare and sort experiences in ranking tables. It is not necessarily a direct measurement of the quality of a particular experience as rated by its customers. I've found it a useful tool to allow me to find the best experiences with confidence. But I've also found it important to read the customer reviews before making any final judgements!

We calculate an experience's ranking score using a multi-factor data model instead of a raw data average (mean). This model takes into account several important questions. For instance - is there a trusted body of reviews? What is the age of a review and is the review from a credible source?

Below you'll find details around some of the important factors that went into calculating the ranking score for Waitomo Glowworm Caves.

If you have any questions or comments about our ranking score calculation please get in touch at info@rankers.co.nz. We don't believe this is perfect or complete so we're always interested in ways we might make improvements.

Nick Morrison's avatar

Nick Morrison

Rankers owner

Waitomo Glowworm Caves

Valid Reviews

288 Valid Reviews

The Waitomo Glowworm Caves experience has a total of 289 reviews. There are 288 valid reviews that are included when calculating the ranking score and 1 invalid review that are excluded from the calculation. Reviews can be excluded only when a reviewer is not verified or after an investigation by our team determines the reviewer is not genuine.

Below is the distribution of ratings for the 288 valid reviews:

Rating Count Percentage
10/10 36
13%
9/10 52
18%
8/10 81
28%
7/10 64
22%
6/10 22
8%
5/10 13
5%
4/10 8
3%
3/10 5
2%
2/10 4
1%
1/10 3
1%

75.66% Average

The raw data average (mean) for all the Waitomo Glowworm Caves valid reviews is 75.66% and is based on 288 valid reviews. This value is not used to calculate the ranking score and it only provided here as a comparison to the weighted average.

Face-to-Face Reviews

263 Face-to-Face Reviews

The Rankers team meets with travellers while they’re in New Zealand and conducts face-to-face surveys. These reviews, in our opinion, are the most trusted in the industry and represent a critical control sample. To our knowledge, we are the only travel review website in the world that has gone to this extent.

More about face-to-face reviews

Within the 288 valid reviews, the experience has 263 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 263 face-to-face reviews:

Rating Count Percentage
10/10 29
11%
9/10 49
19%
8/10 76
29%
7/10 57
22%
6/10 21
8%
5/10 13
5%
4/10 7
3%
3/10 5
2%
2/10 4
2%
1/10 2
1%

75.36% Average

The raw data average (mean) for all the Waitomo Glowworm Caves face-to-face reviews is 75.36% and is based on 263 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average

76.37%

Rankers calculates a weighted mean as a base average on which we can improve. Individual review's ratings are given a weight based on several factors. The weight of a review determines the overall impact it'll have on the final weighted average.

Recent reviews have more weight as they are more relevant and reflect the experience as it currently operates. Over time reviews become less relevant and loose their impact on the ranking score.

Low rating reviews carry slightly less weight. This dampens the effect of very low ratings for every experience across the board. This is especially important when the experience has few reviews overall and a single negative rating can grossly mischaracterise an experience. Consistent poor reviews will still result in the experience receiving a comparitively low ranking score.

Credible sources provide reviews that can be trusted. If we have verified a reviewer is genuine via a face-to-face meeting then the review carries additional weight.

Reviewer Rating Age Relative Weight
ros fraser 4/10 1063 days 84%
wynden 1/10 1091 days 75%
Rado Hank 10/10 1178 days 100%
Lizzie Edmonds 8/10 1179 days 95%
Anis Quentin 7/10 1186 days 91%
Jeny Smolders 7/10 1190 days 91%
Oscar Petersen 8/10 1197 days 94%
Ani 9/10 1305 days 95%
Martin Murlik 8/10 1418 days 86%
Laura 9/10 1429 days 90%
Melanie Farrell 7/10 1437 days 81%
Andy 10/10 1444 days 89%
Julia Achatz 5/10 1458 days 72%
Auba Mateos 7/10 1464 days 80%
Charlotte 7/10 1464 days 80%
Isabel Zedelius 8/10 1467 days 84%
Dries 8/10 1507 days 82%
Clarissa Glaser 8/10 1508 days 82%
Alna 10/10 1513 days 86%
Holger Worner 9/10 1513 days 86%
Karlee Hormell 9/10 1522 days 86%
Alonso 9/10 1526 days 86%
Rose Guillaume 8/10 1529 days 81%
Caroline Coudray 8/10 1533 days 81%
Barbara 8/10 1533 days 81%
Leonie Brabers 7/10 1541 days 78%
Bina Johansson 10/10 1541 days 85%
Sam Staines 9/10 1545 days 85%
Erik 6/10 1548 days 71%
Nicole Signer 8/10 1555 days 80%
Sam Taylor 7/10 1559 days 77%
Vanuxem 8/10 1763 days 73%
Clara Bertomeu 10/10 1763 days 76%
Lukas Boller 9/10 1765 days 76%
Mette Elholm 7/10 1779 days 69%
Mathilde Arp 8/10 1779 days 72%
Chloe and Guillame 9/10 1783 days 76%
Andre 9/10 1785 days 75%
Doerte 10/10 1785 days 75%
Saskia Peek 9/10 1786 days 75%
Erika Tarant 8/10 1786 days 72%
Jennifer Nguyen 7/10 1787 days 69%
Julie Duvert 7/10 1787 days 69%
Dan Ramsl 4/10 1787 days 60%
Lucy Mulvin 7/10 1788 days 69%
Fine Kochling 9/10 1790 days 75%
Eberhard 9/10 1790 days 75%
Hannes 8/10 1791 days 71%
Calum Penn 9/10 1793 days 75%
Arthur Portolleau 6/10 1794 days 62%
Elisabet 10/10 1795 days 75%
Tommy Mannien 8/10 1796 days 71%
Solange Bourbeois 8/10 1799 days 71%
Talissa Missiato 10/10 1799 days 75%
Severin Knegsch 9/10 1800 days 75%
Pierre Jouffineau 10/10 1801 days 75%
Lewis Whittle 8/10 1803 days 71%
Ben and Pauline 8/10 1805 days 71%
Ann-Kathrin 7/10 1810 days 68%
Natasha Harbinson 10/10 1811 days 74%
Sebastian 2/10 1812 days 56%
Jaquein Bucholz 3/10 1812 days 57%
Chiara 7/10 1812 days 68%
Cariotta Kemper 3/10 1812 days 57%
Megan Lenox 7/10 1815 days 68%
Max Mustermann 8/10 1817 days 70%
Amy Stafford 8/10 1820 days 70%
Carl 7/10 1820 days 67%
Briony 7/10 1822 days 67%
Melanie Kronbichler 8/10 1823 days 70%
Andreas Schiefer 7/10 1824 days 67%
Veronique Kaplan 3/10 1826 days 57%
Robin Ings 6/10 1827 days 61%
Stula Vladimir 7/10 1828 days 67%
David Soukal 8/10 1828 days 70%
Olivia Aliprandi 7/10 1829 days 67%
Isabelle 2/10 1831 days 55%
Jonathan Gourmel 8/10 1831 days 70%
Mikkel Palleson 4/10 1834 days 58%
Franziska and Sabine 7/10 1835 days 67%
Chloe Guerillot 7/10 1835 days 67%
Faye Oliver 7/10 1837 days 67%
Iris Kerbler 9/10 1837 days 73%
Til Schaebitz 6/10 1838 days 61%
Elisabeth Grabner 9/10 1840 days 73%
Berith 10/10 1840 days 73%
Chris Simpson 6/10 1843 days 61%
Pekka and Jonna 9/10 1843 days 73%
Jonas Hoerning 8/10 1844 days 69%
Nils 10/10 1844 days 73%
Mark Rosema 8/10 1845 days 69%
Lisa Huber 10/10 1845 days 73%
Nicola Wiggan 9/10 1866 days 72%
Linda and Gunther 4/10 1867 days 57%
Julie 9/10 1868 days 72%
Maria Schaer 7/10 1872 days 65%
Mette and Jesper 5/10 1874 days 58%
Pierre and Alexandra 6/10 1880 days 59%
Julia Waenninger 8/10 1892 days 68%
Sarah Boettcher 9/10 1928 days 70%
Suzanne Vermeulen 6/10 1945 days 57%
Blandine Giusti 7/10 2148 days 55%
Bart Hanssen 6/10 2227 days 48%
Astrid Egesten 7/10 2278 days 50%
Jean Curry 9/10 2502 days 46%
Carla Oyarzun 1/10 2506 days 34%
Philippe Chiasson 9/10 2512 days 46%
Helma Druyken 4/10 2522 days 36%
Florian Guttler 7/10 2525 days 41%
Casandra Prunica 8/10 2526 days 43%
Lauren Hedley 7/10 2526 days 41%
Janina Zwerver 8/10 2526 days 43%
Marieke Feyteres 4/10 2530 days 36%
van Linda Werner 5/10 2530 days 37%
Philip Donachie 7/10 2540 days 41%
Luisa Bach 8/10 2540 days 43%
Kristina 7/10 2542 days 41%
Eugen Lehner 6/10 2543 days 37%
Manuel Bach 7/10 2543 days 41%
Matthias Freiling 2/10 2550 days 33%
Debora Grusler 6/10 2553 days 37%
Andreas Brodhaeker 8/10 2566 days 42%
Renee van der Syde 7/10 2567 days 40%
Martha Horst 8/10 2567 days 42%
Roland Beer 7/10 2571 days 40%
Johanna Bak 4/10 2571 days 34%
Lior Bakski 9/10 2581 days 43%
Bet 9/10 2582 days 43%
Memain 8/10 2855 days 31%
Konza 7/10 2856 days 29%
Steen Rausmussen 8/10 2887 days 29%
David Restell 10/10 2917 days 30%
Christina Rodewald 9/10 2922 days 29%
Hanneke P 7/10 2948 days 26%
Kohler 9/10 2968 days 28%
Alexandra van den Brack 6/10 2976 days 23%
Paul Lawrence 9/10 2977 days 27%
Abby Rushmer 7/10 2978 days 25%
Stephan Olivier 7/10 2983 days 25%
Stephan Olivier 7/10 2983 days 25%
Faassen 8/10 2987 days 25%
Julie Lamart 8/10 2988 days 25%
Adrian Weidell 5/10 3184 days 15%
Jonathan Tuthill 9/10 3239 days 17%
A Ormsby 10/10 3251 days 16%
Gillian Rowe 10/10 3264 days 16%
Ryan Pynappels 8/10 3265 days 15%
Peter Dellen 8/10 3266 days 15%
Jorg Steffens 8/10 3266 days 15%
Danielle & Jobbe 9/10 3268 days 15%
Christina 6/10 3269 days 13%
Jop Veldhuis 7/10 3269 days 14%
Paul Weidenfeld 8/10 3270 days 15%
Sophie Dorrepaal 7/10 3270 days 14%
Fannette Peyreplane 5/10 3271 days 12%
Norm Cooper 7/10 3275 days 14%
Gloria, Rose & An 8/10 3275 days 14%
A Sorg 10/10 3275 days 15%
Samplonius 5/10 3278 days 12%
Petra 10/10 3278 days 15%
Bethany Hamilton 8/10 3282 days 14%
suffolkhouse69 9/10 3283 days 15%
a a 8/10 3314 days 13%
Julia Balionis 7/10 3328 days 12%
Julia Hartman 3/10 3329 days 10%
Fabienne Indergand 7/10 3349 days 11%
Waldemar Schuler 9/10 3361 days 12%
pepette31 7/10 3436 days 8%
Craig Hathaway 9/10 3588 days 2%
Stephane Lebel 9/10 3593 days 2%
Rens Hemselmans 7/10 3606 days 2%
Isabell 10/10 3608 days 2%
Holly Cave 5/10 3608 days 1%
J Palmer 6/10 3612 days 1%
Liz & Jim 10/10 3614 days 1%
Edgar & Marilyn Berry 9/10 3616 days 1%
Simon Vickers 2/10 3619 days 1%
Leslie 8/10 3632 days 1%
Jean-Francois Guilbault 8/10 3633 days 1%
Selina Mueller 7/10 3634 days 1%
Tamlin Barton 3/10 3635 days 0%
Cara Dungay 8/10 3636 days 0%
Bottcher 10/10 3636 days 1%
Alexandra 10/10 3637 days 0%
Philipp Rau 7/10 3639 days 0%
Dan Aldridge 9/10 3641 days 0%
John Allen 8/10 3643 days 0%
Curtis Penner 8/10 3643 days 0%
Brandt 8/10 3645 days 0%
Nadia Husain 5/10 3648 days 0%
T J Andrews 6/10 3664 days 17%
Charli Skinner 7/10 3915 days 19%
Carl_Larsen 10/10 3924 days 21%
Susan & Richard 10/10 3985 days 21%
Rik 9/10 3986 days 21%
Jonathan Martin 7/10 3988 days 19%
Gunda G 9/10 3993 days 21%
Aaron 8/10 3995 days 20%
Will Jemma 6/10 3998 days 17%
Christen Hans 10/10 3999 days 21%
Monica and Danie. 7/10 4007 days 19%
Stephen 5/10 4009 days 17%
Susan 10/10 4009 days 21%
snodge 8/10 4013 days 20%
Bo Moenstead 9/10 4022 days 21%
Alain Deslandres 8/10 4026 days 20%
Jakob Jurgen 10/10 4027 days 21%
EA Anders 8/10 4030 days 20%
Helen and Hans Walser 1/10 4033 days 15%
kevinp 8/10 4056 days 20%
warrenp 9/10 4060 days 21%
braunweiler 9/10 4064 days 21%
pimn 9/10 4069 days 21%
asiacritics 7/10 4075 days 19%
Chris Mackamul 8/10 4082 days 20%
Debbie Rathbone 10/10 4082 days 21%
Lisette X 9/10 4083 days 21%
Martin 10/10 4085 days 21%
Thomas Willi 10/10 4085 days 21%
Elodie 7/10 4086 days 19%
richardh 7/10 4200 days 19%
trvlbug 8/10 4228 days 20%
glennandjen 10/10 4289 days 21%
BryonyS 9/10 4307 days 21%
Marion 9/10 4323 days 21%
Mikey 7/10 4324 days 19%
Richard Komzik 6/10 4325 days 17%
Michael Walsall 10/10 4329 days 21%
Anna 8/10 4343 days 20%
Abigail 7/10 4343 days 19%
lannie 7/10 4352 days 19%
SimonR 8/10 4353 days 20%
SonjaG 7/10 4353 days 19%
Chris 8/10 4359 days 20%
AurelieD 8/10 4366 days 20%
Yunker 10/10 4367 days 21%
Andrew 8/10 4369 days 20%
Erin 9/10 4369 days 21%
Christopher Gallaga 8/10 4375 days 20%
Amy 10/10 4381 days 21%
Shona 8/10 4381 days 20%
plumbaum 9/10 4383 days 21%
Sandra 10/10 4391 days 21%
Evangelista 8/10 4391 days 20%
Oliver 5/10 4393 days 17%
Kat 9/10 4423 days 21%
Lisa 8/10 4450 days 20%
siobhan 8/10 4452 days 20%
Alice 8/10 4452 days 20%
NORTZ 7/10 4480 days 19%
Stefan 8/10 4482 days 20%
Hugh Trenchard 9/10 4499 days 21%
Niamh 4/10 4505 days 16%
Jenny 9/10 4529 days 21%
Louise 8/10 4538 days 20%
Peddy 10/10 4548 days 21%
Katie Wise 8/10 4551 days 20%
Thomas Bachmann 8/10 4567 days 20%
Daniala 8/10 4586 days 20%
Tom Ben 9/10 4690 days 21%
Sarah Maudsley 8/10 4705 days 20%
Alan Bellerby 8/10 4705 days 20%
Tina Daly 5/10 4711 days 17%
John Woodrow 8/10 4720 days 20%
Ernst Seter 9/10 4720 days 21%
Jim Curley 7/10 4731 days 19%
Daniel 7/10 4732 days 19%
Marc Hertogs 7/10 4735 days 19%
Laura Sutton 5/10 4759 days 17%
Jeroen 5/10 4761 days 17%
Mum! 6/10 4761 days 17%
Gail 9/10 4765 days 21%
Heike Julia 6/10 4766 days 17%
Lanni 8/10 4766 days 20%
Amanda Finger 7/10 4767 days 19%
Desiree Muri 7/10 4767 days 19%
Jan Grzejik 8/10 4794 days 20%
Wouter Ewalts 8/10 4801 days 20%
Matilde 6/10 4809 days 17%
Kim 6/10 5006 days 17%
Gillian 8/10 5048 days 20%
Denise Nick 6/10 5058 days 17%
ranker_110 8/10 5077 days 20%
Jasper 7/10 5084 days 19%
Mary 8/10 5084 days 20%
Lucy 6/10 5084 days 17%
Lukas 8/10 5095 days 20%
Hanna 7/10 5097 days 19%

Adjustments

Several adjustments to the weighted average are added to improve relevancy and credibility. These adjustments apply equally to all experiences that meet the criteria.

Sample Size Adjustment

No Adjustment

A reasonable number of reviews are necessary in order for the average to be credible and for an experience to take a prime position within the ranking tables. As such, experiences with only a few reviews have a moderated score. This does not mean that the experience or the reviews can't be trusted. The Waitomo Glowworm Caves experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-4.13% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 48 days. However the Waitomo Glowworm Caves experience does not meet the criteria for any adjustment.

In addition, an experience's ranking score may be adjusted for each day there is no new ranking. After 1 day the adjustment comes into effect. The maximum number of days that can be adjusted for is 200 days. Due to the seasonal nature of many businesses, this adjustment is applied dynamically throughout the year.

The Waitomo Glowworm Caves experience has been adjusted for 200 days. Adjustments are according to the following table.

Days Adjustment
197 -4.07%
198 -4.09%
199 -4.11%
200 -4.13%
201 -4.15%
202 -4.17%
203 -4.19%

Final Ranking Score

72%

The final ranking score once adjustments and rounding has been applied. This value is cached and recalculated each day. Therefore it may not be precisely accurate based on the other values presented.

If you have any questions or comments about our ranking score calculation please get in touch at info@rankers.co.nz.